It should be removed regularly by a dentist or dental hygienist; if neglected, it can cause bacteria to lodge between the gums and the teeth, causing gum infection, dental caries, loosening of the teeth, and other disorders. Called also tartar. gastric calculus gastrolith. intestinal calculus enterolith. lung calculus a hard mass or concretion formed in the bronchi around a small center of inorganic material, or from calcified portions of lung tissue or adjacent lymph nodes. Called also pneumolith.
1 Second, your graduation announcement should include the important details of who, what, when, where, and why. 2  This information lets the recipient know what they need to do and by when. 3  If your graduation announcement includes an invitation, RSVP information should be included.
From who should get an invite, to appropriate gifts, etiquette experts share their tips for surviving graduation with class. There is a major difference between graduation announcements (that include graduation/degree details) and graduation invitations (an invite to the actual ceremony). Students tend to have a limited amount of tickets to the ceremony, so not every family member and friend will be able to attend.